EP0894961A2 - Verfahren zur Verhinderung von Ruckelschwingungen beim positiven und negativen Beschleunigen von Kraftfahrzeugen - Google Patents
Verfahren zur Verhinderung von Ruckelschwingungen beim positiven und negativen Beschleunigen von Kraftfahrzeugen Download PDFInfo
- Publication number
- EP0894961A2 EP0894961A2 EP98113615A EP98113615A EP0894961A2 EP 0894961 A2 EP0894961 A2 EP 0894961A2 EP 98113615 A EP98113615 A EP 98113615A EP 98113615 A EP98113615 A EP 98113615A EP 0894961 A2 EP0894961 A2 EP 0894961A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- torque
- accelerator pedal
- stage
- natural frequency
- engine torque
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 22
- 230000001133 acceleration Effects 0.000 title claims description 14
- 230000010355 oscillation Effects 0.000 title claims description 7
- 230000006870 function Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000001609 comparable effect Effects 0.000 description 2
- 230000036461 convulsion Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2454—Learning of the air-fuel ratio control
- F02D41/2461—Learning of the air-fuel ratio control by learning a value and then controlling another value
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/10—Introducing corrections for particular operating conditions for acceleration
- F02D41/107—Introducing corrections for particular operating conditions for acceleration and deceleration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1497—With detection of the mechanical response of the engine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/20—Reducing vibrations in the driveline
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
Definitions
- the invention relates to a method for preventing jerky vibrations (Drive train vibrations) with the positive and negative acceleration of motor vehicles with manual transmissions and with one acting on a drive motor Accelerator pedal for specifying the engine torque.
- jerky vibrations Drive train vibrations
- the invention relates to a method for preventing jerky vibrations (Drive train vibrations) with the positive and negative acceleration of motor vehicles with manual transmissions and with one acting on a drive motor Accelerator pedal for specifying the engine torque.
- the vehicle acceleration increases as a function of the accelerator pedal movement F or the accelerator pedal stroke from an initial value a o to a new stationary value a 1 .
- a decaying vibration is superimposed on this new stationary acceleration a 1 , which the driver perceives as jerking vibration or jerking.
- the cause of this vibration is the introduction of energy into the two-mass vibration system engine-powertrain-body, ie the body vibrates connected to the engine via the "torsion spring" powertrain.
- a comparable effect results if the driver quickly reduces the accelerator pedal stroke.
- This bucking represents a significant loss of comfort and often leads to customer complaints, with corresponding Costs are associated.
- Another known method is to specify the driver So dampen the accelerator pedal movement, so that for example the throttle valve at lower speed is opened as specified by the accelerator pedal.
- the responsiveness of the vehicle deteriorates noticeable, which also often leads to customer complaints leads.
- An object of the present invention is now a Method for preventing jerky vibrations at the beginning to create named genus by the jerky vibrations in all operating states can be effectively prevented without that the response of the vehicle deteriorates noticeably.
- This object is achieved in that at a Accelerator pedal specification for a sudden change in engine torque from an output torque to a target torque this engine torque is changed in two stages, the first Intermediate engine torque is given step by step starting from an initial value of vehicle acceleration leads to a vehicle acceleration, the first of which occurs Vibration has a peak value that corresponds to the new one Target torque corresponding to the stationary value of vehicle acceleration corresponds, and that in the second stage when reached this peak value, the target torque is set abruptly becomes.
- the method according to the invention avoids the disadvantages of the known Process, i.e. no ignition intervention is required, that could lead to emissions deterioration, already the first jerking is prevented because it has no trigger function exercises more, the jerking can in all operating conditions can be prevented and the response of the vehicle remains almost unchanged since there is no damping the accelerator pedal movement is required.
- stage duration of the first stage and the intermediate engine torque is advantageously based on an algorithm and / or of a read-only memory content or map at least in Dependence of the current gear ratio, the natural frequency the vibration arrangement of the engine and powertrain body and the stroke of the accelerator pedal movement or the stroke of the requested Torque set.
- This setting can continue depending on the current Torsional state of the drive train and / or depending the direction of movement of the accelerator pedal.
- the natural frequency of the vibration arrangement of the engine and drive train body is expediently recorded during vehicle operation, where those stored in the read-only memory or map Natural frequency values continuously through the measured natural frequency values be adapted. This allows z. B. Series spreads and changes over the life of the vehicle are taken into account become.
- the two-stage change in engine torque is only from one predeterminable speed and / or from a predeterminable Stroke of the pedal movement performed.
- the output engine torque M o predetermined up to this point in time is not corresponding to the target torque M 1 corresponding to the actuation of the accelerator pedal, but only to an intermediate engine torque M zw .
- This intermediate engine torque M zw is selected such that the first peak value of the vibration of the vehicle acceleration a which occurs with such an engine intermediate torque corresponds exactly to the new stationary value a 1 of the vehicle acceleration which is assigned to the target torque M 1 .
- the oscillation of vehicle acceleration a that occurs reaches this peak value a 1 and would then swing out according to the dash-dotted line if this intermediate engine torque were maintained, ie jerky vibrations or drive train vibrations would then occur. Therefore, at the time t 1, the engine torque is raised from the intermediate engine torque M zw to the target torque M 1 , so that swinging back is no longer possible and the new value a 1 of the vehicle acceleration, which corresponds exactly to the target torque M 1 , is maintained. This reliably prevents jerky vibrations.
- the step duration describes the time between the start of the oscillation and the upper peak value and thus corresponds to a quarter of the oscillation period.
- This period of oscillation corresponds to the reciprocal of the natural frequency f e of the two-mass oscillation system engine-drive train-body.
- This natural frequency is determined by the inertia of the engine and body as well as the spring and damping constant of the drive train. Since the inertia must be reduced to a threshold in the calculation, the ratios of the manual gearbox and the rear axle gearbox must also be taken into account.
- the jerking frequency can be f e and thus the step duration T s is thus dependent on the gear.
- an algorithm is therefore used within the traction force transmission function which specifies the step duration as a function of the current overall gear ratio and the natural frequency f e and the stroke of the accelerator pedal movement. Another algorithm is used to determine the intermediate torque M between .
- the current torsion status of the drive train and the direction of movement of the accelerator pedal can also be taken into account.
- the two parameters can also taken from corresponding maps or a read-only memory become.
- the saved values can in turn be determined using algorithms and / or empirically.
- the natural frequencies f e of the two-mass vibration system can also be measured by measurement during vehicle operation.
- the natural frequencies or parameters stored in the read-only memory or characteristic map can be adapted by means of the measured variables acquired. In this way, for example, series spreads and changes over the life of the vehicle can be taken into account. It is not necessary to have pronounced bucking vibrations to record these measured variables. Even weak load change vibrations, which the driver hardly notices, can be used to measure the natural frequencies.
- the traction transfer function according to the invention with the two-stage Raising the engine torque can affect certain situations be restricted. For example, this traction transfer function only from a predeterminable speed of Accelerator pedal movement or from a predetermined stroke of the accelerator pedal movement be applied. Furthermore, restrictions may apply only on certain directions of movement of the accelerator pedal or certain Transmission gears are provided.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
- Figur 1
- ein Signaldiagramm zur Erläuterung des Auftretens von Ruckelschwingungen bei herkömmlichen Systemen und
- Figur 2
- ein Signaldiagramm zur Erläuterung des erfindungsgemäßen Verfahrens, das Ruckelschwingungen vermeidet.
Claims (7)
- Verfahren zur Verhinderung von Ruckelschwingungen beim positiven und negativen Beschleunigen von Kraftfahrzeugen mit Handschaltgetrieben und mit einem auf einen Antriebsmotor einwirkenden Fahrpedal zur Vorgabe des Motormoments, dadurch gekennzeichnet, daß bei einer Fahrpedalvorgabe zur sprungartigen Änderung des Motormoments von einem Ausgangsmoment (Mo) zu einem Zielmoment (M1) dieses Motormoment in zwei Stufen verändert wird, wobei in der ersten Stufe sprungartig ein Zwischenmotormoment (Mzw) vorgegeben wird, das ausgehend von einem Ausgangswert (ao) der Fahrzeugbeschleunigung zu einer Fahrzeugbeschleunigung führt, deren erste sich einstellende Schwingung einen Scheitelwert besitzt, der dem neuen, dem Zielmoment (M1) entsprechenden Stationärwert der Fahrzeugbeschleunigung (a1) entspricht, und daß in der zweiten Stufe bei Erreichen dieses Scheitelwertes sprungartig das Zielmoment (M1) vorgegeben wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Stufendauer (t1 - to) der ersten Stufe anhand eines Algorithmus und/oder eines Festwertspeicherinhaltes oder Kennfeldes wenigstens in Abhängigkeit der aktuellen Getriebeübersetzung, der Eigenfrequenz der Schwingungsanordnung Motor-Triebstrang-Karosse und des Hubes der Fahrpedalbewegung eingestellt wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Einstellung weiterhin in Abhängigkeit des aktuellen Torsionszustandes des Triebstranges erfolgt.
- Verfahren nach Anspruch 2 oder 3, daß die Einstellung weiterhin in Abhängigkeit der Bewegungsrichtung des Fahrpedals erfolgt.
- Verfahren nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, daß die Eigenfrequenz während des Fahrzeugbetriebes meßtechnisch erfaßt wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß die im Festwertspeicher oder Kennfeld abgelegten Eigenfrequenzwerte durch die gemessenen Eigenfrequenzwerte adaptiert werden.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die zwei-stufige Veränderung des Motormoments erst ab einer vorgebbaren Geschwindigkeit und/oder einem vorgebbaren Hub der Fahrpedalbewegung durchgeführt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19733472 | 1997-08-02 | ||
DE1997133472 DE19733472C2 (de) | 1997-08-02 | 1997-08-02 | Verfahren zur Verhinderung von Ruckelschwingungen beim positiven und negativen Beschleunigen von Kraftfahrzeugen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0894961A2 true EP0894961A2 (de) | 1999-02-03 |
EP0894961A3 EP0894961A3 (de) | 2000-05-10 |
Family
ID=7837802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98113615A Withdrawn EP0894961A3 (de) | 1997-08-02 | 1998-07-22 | Verfahren zur Verhinderung von Ruckelschwingungen beim positiven und negativen Beschleunigen von Kraftfahrzeugen |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0894961A3 (de) |
DE (1) | DE19733472C2 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1764496A2 (de) * | 2005-09-20 | 2007-03-21 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Filterung eines Signals |
EP1849980A2 (de) * | 2006-04-27 | 2007-10-31 | Hitachi, Ltd. | Motorsteuerung |
CN115384513A (zh) * | 2022-08-31 | 2022-11-25 | 东风柳州汽车有限公司 | 车辆控制方法、装置、设备及存储介质 |
WO2022247980A1 (de) * | 2021-05-25 | 2022-12-01 | Schaeffler Technologies AG & Co. KG | Verfahren zum betrieb eines antriebsstrangs eines kraftfahrzeugs |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19948153A1 (de) * | 1999-10-07 | 2001-04-12 | Volkswagen Ag | Verfahren und Anordnung zum Verringern von Lastwechselschlägen bei einem Kraftfahrzeug |
DE19949449B4 (de) * | 1999-10-14 | 2005-11-03 | Daimlerchrysler Ag | Verfahren zur Dämpfung von Ruckelschwingungen |
DE10040127B4 (de) * | 2000-08-17 | 2007-06-28 | Daimlerchrysler Ag | Verfahren zum komfortverbesserten Betrieb eines Kraftfahrzeuges mit einem Automatikgetriebe |
DE10119724B4 (de) * | 2001-04-21 | 2006-01-19 | Daimlerchrysler Ag | Vorrichtung zur Verhinderung von Lastschlägen in Antriebsstrang von Kraftfahrzeugen |
DE102006013676A1 (de) * | 2006-03-24 | 2007-09-27 | Bayerische Motoren Werke Ag | Kraftfahrzeug mit elektronischer Fahrerwunschvorgabeeinrichtung |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4640243A (en) * | 1984-02-24 | 1987-02-03 | Nissan Motor Company, Limited | System and method for controlling intake air flow for an internal combustion engine |
EP0449160A2 (de) * | 1990-03-26 | 1991-10-02 | Nippondenso Co., Ltd. | Steuerungssystem zur Steuerung des Ausgangsdrehmoments einer Brennkraftmaschine |
EP0461504A2 (de) * | 1990-06-04 | 1991-12-18 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzanlage für die Brennkraftmaschine eines Kraftfahrzeugs |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3243235A1 (de) * | 1982-11-23 | 1984-05-24 | Robert Bosch Gmbh, 7000 Stuttgart | Einrichtung zum daempfen von ruckelschwingungen bei einer brennkraftmaschine in einem kraftfahrzeug |
DE3924077A1 (de) * | 1989-07-20 | 1991-01-24 | Bosch Gmbh Robert | Verfahren zur steuerung der kraftstoffmenge von brennkraftmaschinen |
DE4321333A1 (de) * | 1993-06-26 | 1995-01-05 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Steuerung einer Antriebseinheit eines Fahrzeugs |
-
1997
- 1997-08-02 DE DE1997133472 patent/DE19733472C2/de not_active Expired - Fee Related
-
1998
- 1998-07-22 EP EP98113615A patent/EP0894961A3/de not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4640243A (en) * | 1984-02-24 | 1987-02-03 | Nissan Motor Company, Limited | System and method for controlling intake air flow for an internal combustion engine |
EP0449160A2 (de) * | 1990-03-26 | 1991-10-02 | Nippondenso Co., Ltd. | Steuerungssystem zur Steuerung des Ausgangsdrehmoments einer Brennkraftmaschine |
EP0461504A2 (de) * | 1990-06-04 | 1991-12-18 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzanlage für die Brennkraftmaschine eines Kraftfahrzeugs |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1764496A2 (de) * | 2005-09-20 | 2007-03-21 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Filterung eines Signals |
EP1764496A3 (de) * | 2005-09-20 | 2009-12-23 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Filterung eines Signals |
EP1849980A2 (de) * | 2006-04-27 | 2007-10-31 | Hitachi, Ltd. | Motorsteuerung |
EP1849980A3 (de) * | 2006-04-27 | 2012-08-08 | Hitachi, Ltd. | Motorsteuerung |
WO2022247980A1 (de) * | 2021-05-25 | 2022-12-01 | Schaeffler Technologies AG & Co. KG | Verfahren zum betrieb eines antriebsstrangs eines kraftfahrzeugs |
CN115384513A (zh) * | 2022-08-31 | 2022-11-25 | 东风柳州汽车有限公司 | 车辆控制方法、装置、设备及存储介质 |
CN115384513B (zh) * | 2022-08-31 | 2024-05-14 | 东风柳州汽车有限公司 | 车辆控制方法、装置、设备及存储介质 |
Also Published As
Publication number | Publication date |
---|---|
EP0894961A3 (de) | 2000-05-10 |
DE19733472A1 (de) | 1999-02-04 |
DE19733472C2 (de) | 1999-08-05 |
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